Lawn darts are metal, or plastic tipped darts often used in various team lawn games, notes Wikipedia. They are designed to be thrown underhanded toward a target on the ground.
According to the U.S. Consumer Product Safety Commission, between 1980 and 1988 over 6,100 injuries were reported due to lawn-dart use. Approximately 81 percent of those injuries were to individuals who were 15 years of age or younger. Three deaths, all children, occurred from lawn-dart use since 1997.
As of 1988, the U.S. Consumer Product Safety Commission, known as CPSC, banned all lawn-dart sales. Canada banned metal-tipped darts in 1989. In 1997, CPSC recommended all remaining darts be destroyed or discarded immediately.